以水为溶剂的OTMAB改性凹土对Cr^6+吸附性能的影响

A Study on Cr^6+ Adsorption Properties of Attapulgite Clay Modified by OTMAB under the Condition of Water as Sllvent

将凹土原土进行酸洗、活化预处理后,以十八烷基三甲基溴化铵(OTMAB)和水为原料,对凹土进行改性。并以二苯碳酰二肼分光光度法测定不同情况下改性凹土对Cr^6+的吸附率。实验结果表明:预处理的凹土,吸附效果明显加强,吸附率达15.1%;预处理的凹土进行改性后,吸附效果显著提高,吸附率最高达42.3%。经过表征,吸附效果较好的凹土晶体结构有了明显的优化。

This paper makes a study on Cr^6+ adsorption properties of attapulgite clay modified by octadecy trimethyl ammonium bromide (hereinafter referred to as OTMAB).After the attapulgite clay is treated and activated,the pre-treated attapulgite clay is organically modified with different mass ratios of OTMAB under the condition of water as solvent.The experimental results show that the adsorption effect of pre-treated attapulgite clay was obviously strengthened and the adsorption rate reached 15.1%.The adsorption rate comes to 42.3% after the modified attapulgite clay,which shows the best adsorption effect.After characterization,the crystal structure of attapulgite with better adsorption effect gets obviously optimized.